Cary was at his best when teamed with Alfred Hitchcock. Probably the quintessential Grant would be "To Catch A Theif". Cary on the French Rivera with Grace Kelly, the scene in the bedroom when they are about to kiss with the fireworks in the background is almost orgasmic, which says a lot for 1950s cinema.

But my personal favorite...North by Northwest, it is more of an any man could get thrown into this situation and you never know what is going to happen next....and that house in the final scenes....ow, i want that house (alas, I have been to Mt. Rushmore, and no such house really exists.)